class_docstr: The required interface for providing traversable
  resources.
code: def is_resource(self, path: StrPath) -> bool:
      return self.files().joinpath(path).is_file()
  
imports: import abc
  import io
  import os
  from typing import Any, BinaryIO, Iterable, Iterator, NoReturn, Text, Optional
  from typing import runtime_checkable, Protocol
  from typing import Union
label_desc: Use image node_id 4 for calling the TraversableResources obj's underlying member method code with example usage: obj.is_resource(path) and returns: self